[suggestion] Add Correct Image Resolution

[Jensen Head]

I recently encountered a situation of recognizing a scanned book, the page images of which were made with acceptable quality, but the resulting PDF file had incorrect page sizes. (Then I checked other books in my library and found that this is quite a common case.) As a result, the pages were huge in physical size, and the scanning resolution was very low. ABBYY FineReader PDF has a function for automatic resolution correction. I do not know whether it is based on the size of the page letters (in pixels in the image and in millimeters in the page coordinate space), or on the page aspect ratio, comparing them with the aspect ratios of standard sheet sides. If I understand correctly, the Action "Enhance Scanned Pages" does not currently contain this function. It is also not found by searching the Actions Library (but this does not mean anything). Please consider adding it.

Related topic — New document from Image: forcing specify resolution

[Daniel - PDF-XChange]

Hello, Jensen Head

My apologies if it was unclear, this is already being investigated:

After this testing, and some discussion with the dev team, we did identify one key issue from inspecting your document. There will be times when a document like you have is actually a decently high DPI image, but for some reason, is improperly scaled. In this case, it is ~5x the "intended" sheet size, making the DPI seem low, which confuses the OCR engine, giving poorer result than it should otherwise be able to.
We are not sure how to address this issue, since the ratio and optimal range will vary greatly based on range of font sizes, but we are looking into that particular aspect now.

Looking at this more immediately, this is already possible semi-manually by using part of the process I mentioned in that same post.
If you use the "resize pages" command on any document with improperly sized pages, to set everything to the intended sheet size, any oversized full page images and their respective DPI values, will be adjusted to match the new dimensions. This is not a case of image recompression, but a simple case of calculations.

Kind regards,